Incubator.



.Patented Mar. 20,'10011v Suu. 670,400.

D. COBLE.

'INYCUBATUR (Application filed may 4, 139s.)

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UNITED STATES PATENT OFFICE.

DAVID ol coBLE, oF ELIzABnrH'rowN, PENNSYLVANIA.

INCUBATOR.

SPECIFICATION forming part of Letters Patent, No. 670,490, dated March 26, 1901.

Application filed May 4, 1898. Serial No. 679,695. (No model.)

useful Improvement in Incubators, of which.

the following is a specification.

This invention relates to improvements in iucubators; and the object of my invention` is to `heat all portions of the egg-chamber to the same degree and so that any rising and falling of the temperature -therein may be uniform throughout the whole extent of said chamber.

The invention consists in the construction and combination of the various parts, as hereinafter fully explained and then pointed out in the claims.

In the accompanying drawings, which form a part of this specification, Figure lis a front elevation of an incubator embodying my improvements; and Fig. 2, a top plan View of the same, a portion of the lid being cutaway. Fig. 3 is avertical transverse section; Fig. 4, a horizontal section on broken line44 of Fig. 3, and Fig. 5 a horizontal section on broken line 5 5 of Fig. 3.

Similar letters indicate like parts throughout the several views.

Referring to the details of the drawings, A indicates the outer wall of the case of the incubator, which is circular, as are all ythe chambers therein, and A is the top or lid.

B indicates the egg-chamber, having supports B' therein, on which rest the egg-trays b, and D is the door of the egg-chamber, adapted to be opened by turning the swinging edge downward, as seen in Fig.. 1. The egg-chamber is surrounded by a vertical wall D', of asbestos, placed a suitable distance inside of wall A, the space between which two walls is filled with a packing of mineral wool d. The egg-chamber is separated from the hot-air chamber above it (to be described) by a partition E, of zinc, which partition extends over packing d and to outer wall A. Partition E forms the bottom of hot-air chamber F, also surrounded by a vertical wall F, of asbestos, located a greater distance inside of outer wall A than is the asbestos wall D of the egg-chamber to more effectually concentrate the heat on partition E, and the space between wall F and outer wall A is also filled with mineral wool f. Hot-air chamber F is covered bya partition G, which extends over' the space between asbestos wall F and outerv end .z of said flue being curved downward and passing into hot-air chamber F through a centrally-located opening in partition G and its asbestos lining g. To the end z of hot-air fine L, just below lining g of partition G, is attached a cone-shaped deflector M, whereby the hot air is diffused over the bottom and toward the sides of hot-air chamber F. Immediately below deliector M and of th'e'same dimensions as the mout-h thereof is a protectorplate m', supported above partition` E, forining the floor of the hot-air chamberfby feet m. This plate m protects the center of partition E from being struck directly by the hot air entering chamber Fv through fine L and prevents the center of said partition E from being heated to a higher degree than are the other portions-of the partition, thus heating said partition uniformly throughout its Whole extent and producing auniformtemperature throughout egg-chamber B.

T indicates vertical draft-fines extending from near the bottom of hot-air chamber F up to and throughV top or lid A', and they are symmetrically disposed about the center of said chamber andv adjacent to inner wall F thereof; and S indicates thel draft-flues leading from egg-chamber B up to and through the top of the incubator, as is common in incubators of this class.

On the outer end of hot-air flue L is a vertically-disposed heater-hood L arranged outside of the case and adapted to take over the chimney of a lamp, (not shown,) as is usual, and through this hood the heated air from the lamp is conveyed to flue L. Hood L extends above its connection with flue L, and in its ICO upper end is a valve-opening, closed by a valve-plate e", connected by a bent rod n with a rock-shaft n', journaled in arms N, projecting from the side of the case of the incubator.

In egg-chamber B is a rigid cross-bar R, and to the inner face of said cross-bar is secured the ends of an expansion-plate R', having attached to the center thereof a rod r, which passes out through the Walls of the egg-cham ber and is pivotally connected with the lower end of a vertically-disposed lever P, fulcrumed on a rod p, supported by arms P', projecting from the outer wall of the case. The upper end of lever P has a vertical slot p therein, which is engaged by a crank n2 on a downwardly-extending arm n3 on rockshaft n.

In operation the hot air enters chamber F through flue L and is directed toward the Wall of that chamber by deflector M, and the cooler air is forced eilt of said chamber through draft-fines T by the pressure of the hotter air above it. Eggchamber B is heated through partition E, and when the ltemperatu re of said chamber rises above a certain point the plate R expands to such an extent as to draw the lower end of lever P far enough inward to raise valve-plate e and cut off the How of hot air into chamber F. When egg-chamber B is suiiciently cooled, the contraction of expansion-plate R again lowers valve-plate e.

I do not limit myself t0 any particular construction of the delector or of the protectorplate, neither do Irestrict myself to the other details of the construction herein shown and described, as it is obvious that many alterations may be made therein without departing from the principle and scope of my invention. l

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is*

l. The combination, in an incubator, of an egg-cham ber, a hot-air chamber above the eggchamber, a heat-conducting partition separating said chambers, a hot-air line entering the top of' the hot-air chamber, a deflector surrounding the innerend of the hot-air flue, a protector-plate between said partition and the deector, and upright draft-lines located around the protector-plate, for the purpose specified.

2. The combination, in an incubator, of an egg-chamber,a hot-air chamberabove the egg chamber and of less diameter than said eggchamber, a heat-conducting partition separating said chambers, a hot-air flue entering the top of the hot-air chamber, a deflector surrounding,r the innerend of the hot-air Iiue, and a protector-plate above said partition and located beneath the dei'lector, for the purpose specified.

3. The combination, in an incubator, ot' an egg-chamber,a hot-ai r chamber abo ve the egg chamber and of less diameter than said eggchamber, a heat-conducting partition separating said chambers, a hot-air flue entering the center of the top of the hot-air chamber, a deflector surrounding,r the inner end of the hot-air due, a protector-[nate supported above said partition and located beneath said deflector, and upright draft-ilnes leading outward from near the bottom of .the hot-air chamber and disposed symmetrically around the protector-plate and adjacent to the inner wall of said hot-air chamber, for the purpose specified.

DAVID C. OOBLE. Witnesses:

P. H. NIssLEY, LEVI K. EBNOLE. 

